Kontaktverschweißung

Kontaktverschweißung, also known as contact welding, is a fusion welding process that utilizes electrical resistance to join two or more metal parts. The process involves passing a high electrical current through the workpieces at the point where they are to be joined. This current flow encounters resistance, generating heat. The intense heat, combined with pressure applied to the joint area, causes the metal to melt and fuse together, forming a strong weld.

There are several variations of contact welding, including spot welding, seam welding, and projection welding, each suited for different applications and joint configurations. Spot welding is commonly used for joining overlapping sheets of metal, creating discrete weld spots. Seam welding, on the other hand, uses rotating electrodes to produce a continuous, leak-tight seam. Projection welding utilizes pre-formed projections on one of the workpieces to concentrate the current and heat at specific points, allowing for precise control of the weld location and strength.

Contact welding is widely employed in various industries, particularly in the automotive, aerospace, and manufacturing sectors, due to its speed, efficiency, and cost-effectiveness. It is well-suited for automated production lines. The process generally requires minimal consumables, such as filler materials, and produces relatively clean welds with minimal spatter. However, the quality of the weld is highly dependent on factors such as the electrical conductivity and surface condition of the materials being joined, as well as the precise control of current, pressure, and welding time.